US20200289268A1 - Heart anchor positioning devices, methods, and systems for treatment of congestive heart failure and other conditions - Google Patents

Abstract

According to one embodiment, a heart anchor tensioning device includes a main body and an elongate shaft. A tension member or tether may be inserted through a lumen of the elongate shaft to allow the shaft to be advanced over the tension member and within a body while the main body is positioned outside of the body. The device also includes an anchor coupling mechanism that is configured to engage a heart anchor and move the heart anchor into engagement with a first wall of the heart. The anchor coupling mechanism is able to lock the heart anchor to inhibit proximal movement of the heart anchor along the tension member. The device further includes a tension indicating mechanism that provides an indication of a force being applied to the heart anchor by the device.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS
• This application is a continuation of U.S. patent application Ser. No. 14/473,556 filed Aug. 29, 2014, entitled “Heart Anchor Positioning Devices, Methods, and Systems for Treatment of Congestive Heart Failure and Other Conditions,” which claims priority to Provisional U.S. Patent Application No. 61/872,568 filed Aug. 30, 2013, entitled “Heart Anchor Positioning Devices, Methods, and Systems for Treatment of Congestive Heart Failure and Other Conditions,” the entire disclosures of which are hereby incorporated by reference, for all purposes, as if fully set forth herein.
BACKGROUND OF THE INVENTION
• The present invention is related to improved medical devices, systems, and methods, with many embodiments being particularly useful for reducing the distance between two points in tissue in a minimally or less invasive manner. Specific reference is made to the treatment of a failing heart, particularly the alleviation of congestive heart failure and other progressive heart diseases. The provided devices, systems, and methods will often be used so as to resize or alter the geometry of a ventricle in a failing heart, such as by reducing its radius of curvature through the process of excluding a portion of the circumference from contact with blood, and thereby reduce wall stress on the heart and improve the heart's pumping performance. Although specific reference is made to the treatment of congestive heart failure, embodiments of the present invention can also be used in other applications in which tissue geometry is altered.
• Exemplary embodiments described herein provide implants and methods for alleviating congestive heart failure and other progressive diseases of the heart. Congestive heart failure may, for example, be treated using one or more implants which are selectively positioned relative to a first wall of the heart (typically an interventricular septum), and another wall of the heart so as to exclude scar tissue and limit a cross sectional area, or distance across a ventricle. Functional deterioration of the heart tissues may be inhibited by decreasing a size of the heart chamber and/or approximating tissues so that stress on the tissues is limited. Implant locations and overall chamber remodeling achieved by placement of a series of implants may be determined so as to provide a beneficial volumetric decrease and chamber shape.
• Congestive heart failure (sometimes referred to as “CHF” or “heart failure”) is a condition in which the heart does not pump enough blood to the body's other organs. Congestive heart failure may in some cases result from narrowing of the arteries that supply blood to the heart muscle, high blood pressure, heart valve dysfunction due to degenerative processes or other causes, cardiomyopathy (a primary disease of the heart muscle itself), congenital heart defects, infections of the heart tissues, and the like. However, in many cases congestive heart failure may be triggered by a heart attack or myocardial infarction. Heart attacks can cause scar tissue that interferes with the heart muscle's healthy function, and that scar tissue can progressively replace more and more of the contractile heart tissue. More specifically, the presence of the scar may lead to a compensatory neuro-hormonal response by the remaining, non-infarcted myocardium leading to progressive dysfunction and worsening failure.
• People with heart failure may have difficulty exerting themselves, often becoming short of breath, tired, and the like. As blood flow out of the heart decreases, pressure within the heart increases. Not only does overall body fluid volume increase, but higher intracardiac pressure inhibits blood return to the heart through the vascular system. The increased overall volume and higher intracardiac pressures result in congestion in the tissues. Edema or swelling may occur in the legs and ankles, as well as other parts of the body. Fluid may also collect in the lungs, interfering with breathing (especially when lying down). Congestive heart failure may also be associated with a decrease in the ability of the kidneys to remove sodium and water, and the fluid buildup may be sufficient to cause substantial weight gain. With progression of the disease, this destructive sequence of events can cause the progressive deterioration and eventual failure of the remaining functional heart muscle.
• Treatments for congestive heart failure may involve rest, dietary changes, and modified daily activities. Various drugs may also be used to alleviate detrimental effects of congestive heart failure, such as by dilating expanding blood vessels, improving and/or increasing pumping of the remaining healthy heart tissue, increasing the elimination of waste fluids, and the like.
• Surgical interventions have also been applied for treatment of congestive heart failure. If the heart failure is related to an abnormal heart valve, the valve may be surgically replaced or repaired. Techniques also exist for exclusion of the scar and volume reduction of the ventricle. These techniques may involve (for example) surgical left ventricular reconstruction, ventricular restoration, the Dor procedure, and the like. If the heart becomes sufficiently damaged, even more drastic surgery may be considered. For example, a heart transplant may be the most viable option for some patients. These surgical therapies can be at least partially effective, but typically involve substantial patient risk. While people with mild or moderate congestive heart failure may benefit from these known techniques to alleviate the symptoms and/or slow the progression of the disease, less traumatic, and therefore, less risky therapies which significantly improve the heart function and extend life of congestive heart failure patients has remained a goal.
• It has been proposed that an insert or implant be used to reduce ventricular volume of patients with congestive heart failure. With congestive heart failure, the left ventricle often dilates or increases in size. This can result in a significant increase in wall tension and stress. With disease progression, the volume within the left ventricle gradually increases and blood flow gradually decreases, with scar tissue often taking up a greater and greater portion of the ventricle wall. By implanting a device which brings opposed walls of the ventricle into contact with one another, a portion of the ventricle may be excluded or closed off. By reducing the overall size of the ventricle, particularly by reducing the portion of the functioning ventricle chamber defined by scar tissue, the heart function may be significantly increased and the effects of disease progression at least temporarily reversed, halted, and/or slowed.
BRIEF SUMMARY OF THE INVENTION
• The present invention generally provides improved medical devices, systems, and methods. Exemplary embodiments of the devices are described for use in reducing the distance between a region along the septum and a region of an external wall of the left ventricle of a heart in a less or minimally invasive manner. According to one embodiment, a heart anchor positioning device is provided. The heart anchor positioning device includes a main body and an elongate shaft having a proximal end that is coupled with the main body and a distal end and a lumen extending between the proximal end and the distal end. A tension member is insertable through the lumen to enable the device to be advanced over the tension member so that the distal end is insertable within a body and adjacent the heart while the main body is positioned outside of the body.
• The heart anchor positioning device also includes an anchor coupling mechanism that is positioned at the distal end of the elongate shaft. The anchor coupling mechanism is configured to engage a heart anchor to move the heart anchor distally and proximally along the tension member and into engagement with a first wall of the heart so as to urge the first wall toward a second wall of the heart. The anchor coupling mechanism is also configured to lock the heart anchor to inhibit proximal movement of the heart anchor along the tension member. The heart anchor positioning device further includes a tension indicating mechanism that is configured to indicate a force being applied to the heart anchor by the device.
• In some embodiments, the main body includes a locking mechanism that is actuatable by a user to lock the heart anchor to inhibit proximal movement of the heart anchor along the tension member and to unlock the heart anchor to allow proximal and distal movement of the heart anchor along the tension member. In such embodiments, the elongate shaft may include a pair of hooks. The pair of hooks may be axially moveable relative to a pin disposed at a distal end of the elongate shaft. Proximal movement of the pair of hooks relative to the pin may engage the pin with a cam component of the heart anchor to unlock the heart anchor.
• In some embodiments, the tension indicating mechanism may be operable in a first mode and a second mode. In the first mode, the tension indicating mechanism may allow the device to engage the heart anchor to urge the first wall toward the second wall without indicating the force being applied by the device. In the second mode, the tension indicating mechanism may indicate the force being applied to the heart anchor by the device. In such embodiments, in the first mode, the elongate shaft may be stationary relative to the main body as the force is applied to the heart anchor by the device. In the second mode, the elongate shaft may be moveable axially relative to the main body as the force is applied to the heart anchor by the device.
• Further, in such embodiments, the elongate shaft may be coupled to a secondary body that is disposed within the main body. The secondary body may engage a spring component that is positioned within the main body and that allows the secondary body to move axially within the main body in the first mode. The main body may include a button component or locking mechanism that is actuatable by a user to switch the tension indicating mechanism from the first mode to the second mode to inhibit axial movement of the secondary body within the main body. The secondary body may include indicia that indicates the force being applied to the heart anchor by the device as the secondary body is moved axially relative to the main body.
• According to another embodiment, a method for securing heart anchors of a heart implant device is provided. The method includes positioning a first anchor in engagement with a first wall of the heart, where the first anchor is coupled with a tension member. The method also includes positioning a second anchor in engagement with a second wall of the heart. The second anchor is slidably coupled with the tension member so that the second anchor may slide proximally and distally along a length of the tension member. The method further includes advancing a tensioning device over the tension member so that a distal end of the tensioning device engages the second anchor while a main body of the tensioning device is positioned outside of the body. The method additionally includes applying a desired anchor force between the tension member and the second anchor via the tensioning device so that the first anchor provides a force urging the first wall toward the second wall and the second anchor provides a force urging the second wall toward the first wall. During the application of the anchor force, the tensioning device may provide an indication of the anchor force applied to the second anchor by the tensioning device. The method may additionally include actuating a locking mechanism of the tensioning device to secure the second anchor to the tension member to restrict proximal movement of the second anchor along the tension member.
• In some embodiments, actuating the locking mechanism of the tensioning device may reconfigure the second anchor from a variable force mode that allows the second anchor to slide proximally and distally along the tension member to a set force mode that restricts proximal movement of the second anchor along the tension member. In such embodiments, actuating the locking mechanism of the tensioning device may move a pair of hooks axially relative to a pin that is positioned on a distal end of an elongate shaft of the tensioning device. Movement of the pair of hooks relative to the pin may engage the pin with a cam component of the second anchor.
• In some embodiments, the method may additionally include advancing the second anchor distally along the tension member with the tensioning device in a first mode of operation, where the first mode of operation allows the tensioning device to engage the second anchor to urge the second wall toward the first wall without indicating the anchor force being applied by the tensioning device. In such embodiments, the method may also include applying the desired anchor force to the second anchor with the tensioning device in a second mode of operation, where the second mode of operation allows the tensioning device to provide the indication of the anchor force applied to the second anchor by the tensioning device. In such embodiments, the method may further include actuating a mode button or level mechanism of a main body of the tensioning device to switch the tensioning device from the first mode of operation to the second mode of operation.
• In any of the embodiments, the applied anchor force may include a Ventricular Contractile Force (VCF) and an additional force of between about 2N and about 6N. Alternatively, the applied anchor force may include a Ventricular Contractile Force (VCF) and an additional force of between about 3N and about 4N.
• According to another embodiment, a system for securing heart anchors of a heart implant device is provided. The system may include a tension member having a first end and a second end, a first anchor coupled with the tension member at the first end, and a second anchor slidably couplable with the tension member. The first anchor may be configured for anchoring engagement with a first wall of the heart. The second anchor may have a variable force mode that allows the second anchor to axially slide proximally and distally along the tension member and a set force mode that inhibits proximal movement of the second anchor along the tension member. The second anchor may be configured for anchoring engagement with a second wall of the heart. The system may also include a tensioning device that is configured to: engage the second anchor to apply an anchor force between the tension member and the second anchor, provide an indication of the anchor force being applied to the second anchor by the tensioning device, and switch the second anchor from the variable force mode to the set force mode and vice versa.
• In some embodiments, the tensioning device may be operable in a first mode that allows the tensioning device to engage the second anchor and apply the anchor force without providing an indication of the anchor force, and operable in a second mode that allows the tensioning device to provide the indication of the anchor force applied to the second anchor by the tensioning device.
• In some embodiments, the system may additionally include a tissue penetrating device that has an elongate shaft and a lumen extending between a proximal end and a distal end of the elongate shaft. A first needle may be disposed within the lumen of the elongate shaft and may be extendable therefrom between a first configuration, in which the first needle is substantially aligned with an axis of the lumen, and a second configuration, in which the first needle curves away from the axis of the lumen. A second needle may be disposed within a lumen of the first needle and extendable therefrom to penetrate the first wall or second wall of the heart.
• In some embodiments, the system may additionally include a cannula or trocar through which an elongate shaft of the tensioning device is inserted to engage a distal end of the tensioning device with the second anchor while a main body of the tensioning device remains positioned outside the body. In such embodiments, the elongate shaft may include a lumen through which the tension member is insertable to allow the tensioning device to be advanced over the tension member through the cannula or trocar. In some embodiments, the tensioning device may include indicia that indicates the force being applied to the second anchor by the tensioning device.
BRIEF DESCRIPTION OF THE DRAWINGS
• The present invention is described in conjunction with the appended figures:
• FIG. 1 illustrates a front and side view of a tissue penetrating device.
• FIG. 2 illustrates a perspective view of the tissue penetrating device ofFIG. 1.
• FIGS. 3A-3C illustrate the tissue penetrating device ofFIG. 1 with an inner and outer needle retracted within an elongate shaft.
• FIGS. 4A-4C illustrate the tissue penetrating device ofFIG. 1 with the inner needle extending from the elongate shaft.
• FIGS. 5A-5C illustrate the tissue penetrating device ofFIG. 1 with the outer needle extending from the elongate shaft.
• FIGS. 6A-6C illustrate the tissue penetrating device ofFIG. 1 with the outer needle extending from the elongate shaft and with the inner needle extending from the outer needle.
• FIG. 7A illustrates a reconstructed left ventricle using a series of implanted anchors so as to mitigate the deleterious effects of congestive heart failure.
• FIG. 7B illustrates a cross-sectional view of the heart ofFIG. 7A, showing a reduction in the size of the left ventricle effected by one of the implants.
• FIGS. 7C and 7D illustrate minimally invasive access to and endoscopic imaging of a pericardium of the heart.
• FIG. 7E illustrates joining of a femoral access tool path through the right atrium and an endoscopic trans-epicardial access tool path by snaring a guidewire within the right ventricle of the heart.
• FIG. 8A illustrates a trocar or shaft positioned adjacent an external wall of a heart in a treatment for congestive heart failure.
• FIG. 8B illustrates an inner needle penetrating through the external wall of the heart in the congestive heart failure treatment.
• FIG. 8C illustrates an outer needle being positioned adjacent the septal wall of the heart in the congestive heart failure treatment.
• FIG. 8D illustrates the inner needle penetrating through the septal wall of the heart in the congestive heart failure treatment.
• FIG. 8E illustrates a guidewire being inserted into the right ventricel of the heart so as to be snared by a snare device and join paths of the guidewire and snare device in the congestive heart failure treatment.
• FIG. 8F illustrates the joined paths of the guidewire and snare device in the congestive heart failure treatment.
• FIG. 8G illustrates a septal anchor positioned adjacent the septal wall and a tension member extending through the septal wall and external wall in the congestive heart failure treatment.
• FIG. 8H illustrates an epicardial anchor application device being used to slide an epicardial anchor distally along the tension member and adjacent the external wall of the heart in the congestive heart failure treatment.
• FIG. 8I illustrates the setpal anchor and epicardial anchor being used to reconfigure the shape of the heart and the volume of the left ventricle in the congestive heart failure treatment.
• FIG. 9A illustrates a cross section view of a tissue penetrating device having a spring actuated triggering mechanism according to an embodiment.
• FIGS. 9B-E illustrate enlarge cross sectional views of the tissue penetrating device ofFIG. 9A.
• FIGS. 10A-E illustrate an embodiment of an epicardial anchor application device.
• FIGS. 11A-D illustrate an embodiment of an exemplary epicardial anchor.
• FIG. 12 illustrates a method for securing heart anchors of a heart implant device.
• In the appended figures, similar components and/or features may have the same numerical reference label. Further, various components of the same type may be distinguished by following the reference label by a letter that distinguishes among the similar components and/or features. If only the first numerical reference label is used in the specification, the description is applicable to any one of the similar components and/or features having the same first numerical reference label irrespective of the letter suffix.
DETAILED DESCRIPTION OF THE INVENTION
• The present invention generally provides improved medical devices, systems, and methods. Exemplary embodiments of the devices are described for use in reducing the distance between a region along the septum and a region of an external wall of the left ventricle of a heart in a less or minimally invasive manner. Hence, embodiments of the tools and methods described herein may find specific use in the treatment of congestive heart failure and other progressive heart diseases by reconfiguring abnormal heart geometry that may be contributing to heart dysfunction. For congestive heart failure therapies, perforating both the exterior wall and the septum from an epicardial approach can provide significant benefits in control over the locations of implant deployments, thereby effectively enhancing the resulting reshaping of the ventricular chamber. Despite this largely epicardial approach, there are surprising benefits to guiding deployment of the implant from along both the epicardial access path and another access path into and via an access path through the right ventricle. This additional right atrial access path into the heart may be via the superior vena cava, the inferior vena cava, the right atrial appendage, or the like, and the pathways may be joined together by coupling of a snare to a guidewire or the like within the right ventricle, the right atrium, the right pulmonary artery, or the like. While a variety of tools will be described herein for providing access pathways, for joining pathways together within the heart, for deploying implants, for maintaining hemostasis, and the like, it should be recognized that alternative embodiments may employ additional or alternative structures, some of which may be off-the-shelf, and some of which may be new structures configured particularly for use in the advantageous therapies described herein.
• Joining pathways may be accomplished by using a guidewire and snare device. To join the pathways, the guidewire is often inserted through the external wall and septal wall of the heart. The external wall and/or septal wall are often composed of relatively tough scar tissue, which makes insertion of the guidewire through these walls relatively challenging. For example, relatively thin and long needles (e.g., 17 Gauge (0.058″)) are often used to penetrate the scar tissue of the external and/or septal walls. The needles need to be relatively long to allow a physician to position the needle through a small incision, through the external wall, and through the septal wall. These thin and long needles often bend or buckle as they are pressed firmly against the tough scar tissue, which complicates the wall penetrating processes. Further, the needle insertion points for the external wall and septal wall are typically not aligned relatively to one another. Rather, the insertion points are often angled or offset from one another by some degree. As such, straight needles are often relatively difficult to work with in penetrating both the external wall and the septal wall.
• The tissue penetrating device described herein is able to easily penetrate tough scar tissue while compensating for the offset insertion points of the external wall and septal wall. This is accomplished by providing a needle and sleeve combination, or a pair of needles, that are coaxially aligned and that slide relative to one another. The needle or inner needle (hereinafter the inner needle) is a small sharp needle that is used to initially penetrate the tough scare tissue of the external wall and septal wall. In initially penetrating the scar tissue, the sleeve or outer needle (hereinafter outer needle) is positioned adjacent the scar tissue and over the inner needle. In this manner the outer needle supports the inner needle and prevents or reduces bending and/or buckling of the inner needle. After the inner needle penetrates the scar tissue, the outer needle may then be advanced over the inner needle and through the tough scar tissue of the external wall or septal wall.
• Further, the outer needle is made of a flexible shape-memory material, such as nitinol, that is able to bend or flex as the outer needle is advanced distally of a distal end of an elongate shaft. As such, after the outer needle is inserted through the external wall, the outer needle may be advanced distally of the external wall, which causes the outer needle to bend toward the insertion point of the septal wall, which may be offset from the insertion point of the external wall. The outer needle may be configured to have any desired degree of bend so as to accommodate patients of various shape and size. The inner needle may likewise be made of a flexible material, such as nitinol, to allow the inner needle to be advanced within a lumen of the outer needle without altering the bent or flexed configuration of the outer needle. The outer and inner needle may be positioned adjacent a desired insertion point on the septal wall and the inner needle may be advanced distally of the outer needle and through the septal wall. A guidewire may then be inserted through a lumen of the inner needle, through the external wall and septal wall, and into a chamber of the heart for snaring and joining insertion paths as described herein.
• For convenience in describing the embodiments herein, the sleeve or outer component is referred to herein as an outer needle. It should be realized, however, that the outer component is not limited to needles and that the outer component may be a sleeve, catheter, elongate shaft, or tube that is configured to track over the inner needle and bend or flex as described herein. In some embodiments, however, the outer component may be a needle that is capable to some degree of insertion through tissue with or without the inner needle.
• In some embodiments, an epicardial anchor application tool or device may be used to facilitate the engagement of the setpal and external walls of the heart and to lock an epicardial anchor about a tether or tension member with the setpal and external walls in engagement. The epicardial anchor application tool or device may include a force gauge or tension indicating mechanism/member that provides an indication to a user of a force that is being applied to the epicardial anchor during engagement of the septal and external walls. The force gauge allows an appropriate amount of force to be applied to the anchor to engage the heart walls without risking damage to the heart walls from over-tensioned heart anchors. In this manner, proper healing of the heart tissue may be encouraged or promoted.
• The epicardial anchor application tool or device may be inserted over a tether and into contact with the epicardial anchor. The epicardial anchor application tool or device may be configured to move the epicardial anchor proximally and distally along the tether and into engagement with the external wall. As the epicardial anchor application tool or device is moving the epicardial anchor distally along the tether, the epicardial anchor application tool or device may be operated in a first mode wherein an indication of the force exerted on the epicardial anchor is not provided to the user. When the septal and external walls contact one another, the epicardial anchor application tool or device may be switched to a second mode wherein an indication of the force exerted on the epicardial anchor is provided to the user. The user may then use force application feedback provided by the epicardial anchor application tool or device to appropriately tension the epicardial anchor, the tether, and a septal anchor to maintain the sepatal and external walls in engagement at a level that promotes healing.
• The epicardial anchor application tool or device may also be used to lock the epicardial anchor in position relative to the tether and in engagement with the external wall. The epicardial anchor application tool or device may further unlock the epicardial anchor to allow for removal of the anchor and/or for the force applied by the anchor on the heart wall to be adjusted. To enable locking and unlocking of the epicardial anchor, the epicardial anchor application tool or device may include a mechanism that engages with and reconfigures the epicardial anchor between a variable force mode in which the anchor is able to slide distally and proximally along the tether, and a set force mode that restricts proximal movement of the anchor along the tether. Having generally described some embodiments, additional feature of the embodiments will be recognized with reference to the figures described below.
• Referring now toFIG. 1, illustrated is atissue penetrating device100 that may be used to penetrate various tissue of the patient, such as an external wall and/or septal wall of a heart.Tissue penetrating device100 includes atool body102 that may be grasped by a physician during a tissue penetrating operation. Attached tobody102 is a pair of finger guides104 through which the physician may insert his or her fingers. Asecond finger guide106, or trigger mechanism, is also slidably coupled withbody102.Finger guide106 is able to slide axially alongbody102 viatrack116 to deploy and retract anouter needle120 relative to anelongate shaft110. Asecond trigger mechanism108 is also slidably coupled withbody102.Second trigger mechanism108 is axially movable alongbody102 viatrack116 to deploy and retract an inner needle (122 ofFIG. 2 and the like) relative to elongateshaft110 andouter needle120.
• Second trigger mechanism108 is operable independently offirst trigger mechanism106 so that theinner needle122 andouter needle120 are independently deployable and retractable to at least some degree relative to one another.Body102 also includes one or more ports,112 and114, through which a guidewire, tether or tension member, and the like may be inserted, or which may function to fluidly couple a pressure sensing fluid pathway with an external pressure monitoring or measuring device (not shown).
• Outer needle120 andinner needle122 are disposed within a lumen ofelongate shaft110 and slidable relative thereto so as to be extendable from the lumen ofelongate shaft110 and retractable within the lumen. Further,outer needle120 and theinner needle122 are coaxially aligned and slidable relative to one another.Outer needle120 is disposed overinner needle122 withinner needle122 being slidably disposed within a lumen ofouter needle120.Inner needle122 is extendable distally beyond a distal end ofouter needle120 and retractable within the lumen ofouter needle120.
• FIG. 2 shows a perspective view of another embodiment oftissue penetrating device100.FIG. 2 illustrates the finger guides104 positioned at a proximal end ofbody102.FIG. 2 further illustrates thesecond finger guide106 slid proximally away from finger guides104, which typically results inouter needle120 andinner needle122 being retracted within the lumen ofelongate shaft110. For illustrative purposes, however,outer needle120 is shown being extended distally ofelongate shaft110 even though thesecond finger guide106 is slid proximally away from finger guides104.FIG. 2 additionally shows that thesecond trigger mechanism108 may be coupled with a shaft or tube that is slidable withinbody102 and/or within a shaft or tube offirst trigger mechanism106. The shaft or tube of thesecond trigger mechanism108 and/or the shaft or tube of thefirst trigger mechanism106 may include lockingcomponents117 that help maintain the position of the second trigger mechanism's shaft or tube and/or first trigger mechanism's shaft or tube relative to one another and/or tobody102. Further, in some embodiments, thelocking component117 may help maintain a positional relationship between theinner needle122 and theouter needle120. For example, as theouter needle120 is advanced distally of the distal end ofelongate shaft110, theinner needle122 may remain in position until the distal tips of both theinner needle122 and theouter needle120 substantially align. Afterward, thelocking component117 may lock the first and second trigger mechanisms,106 and108, together so that further advancement of theouter needle120 causes theinner needle122 to also advance.
• FIG. 2 additionally shows that anouter sleeve130 may be slidably disposed overelongate shaft110.Outer sleeve130 may include alocking mechanism132 that is couplable with a tissue anchoring device (not shown) that is positioned adjacent and/or removably coupled with tissue or an organ of the body (e.g., the heart) through which theinner needle122 and/orouter needle120 are to be inserted. An exemplary embodiment of a tissue anchoring device is further described in U.S. patent application Ser. No. 14/471,973 filed Aug. 28, 2014, entitled “Cardiac Tissue Anchoring Devices, Methods, and Systems for Treatment of Congestive Heart Failure and Other Conditions,” the entire disclosure of which is hereby incorporated by reference, for all purposes, as if fully set forth herein.
• As shown inFIGS. 1 and 2, when axially extended fromelongate shaft110,outer needle120 may bend, flex, or curve away from an axis ofelongate shaft110's lumen. As described herein,outer needle120 may be made of a flexible shape-memory material, such as nitinol, that is able to bend or curve by a radius R as theouter needle120 is advanced distally of a distal end of anelongate shaft110. The flexible material ofouter needle120 also allows the outer needle to straighten when theouter needle120 is retracted withinelongate shaft110's lumen. When retracted withinelongate shaft110's lumen,outer needle120 is substantially aligned with an axis ofelongate shaft110's lumen. The radius of curvature R may be selected such that when theouter needle120 is advanced distally from a distal end ofelongate shaft110, a distal end ofouter needle120 is curved or bent away from the axis of theelongate shaft110's lumen by between 45 and 210°, and more commonly by about 80 and 120°. In one embodiment, the radius of curvature R may be between about 10 and 38 mm. This radius of curvature range ofouter needle120 is found to be sufficient for the majority of patients.
• In some embodiments, the radius of curvature R and/or degree of bend of theouter needle120 may be dynamically adjusted. For example, when theouter needle120 is made of nitinol, the radius of curvature R and/or bend of theouter needle120 may be adjusted by varying the temperature of the needle. The temperature of the nitinol needle may be varied while the needle is within or external to the patient's body and may be varied automatically (e.g., the patient's body temperature may vary the needle's temperature) or in a controlled manner (e.g., via resistive heating of the needle and the like). This variation and control of theouter needle120's shape may allow a physician to adjust the needle to fit or conform to a specific patient's geometry and/or allow a single needle to be used multiple times, such as to place multiple anchors when treating congestive heart failure.
• Theinner needle122 is also made of a flexible material, such as nitinol, that allows theinner needle122 to curve, flex, or bend by radius R as theinner needle122 is advanced simultaneously withouter needle120, or slid within the lumen ofouter needle120. The flexibility of theinner needle122 prevents theinner needle122 from straightening or otherwise affecting the radius of curvature R ofouter needle120. Stated differently, because theinner needle122 is also made of a flexible material, theinner needle122 may be advanced simultaneously withouter needle120, or slid within the lumen ofouter needle120, and bent, flexed, or curved byouter needle120 asouter needle120 is advanced distally fromelongate shaft110. The flexibility ofinner needle122 also allows theinner needle120 to be straightened when theinner needle122 and/orouter needle120 are retracted withinelongate shaft110's lumen. When retracted within the lumen ofelongate shaft110,inner needle122 is substantially aligned with the axis of theelongate shaft110's lumen.
• The dual needle arrangement of thetissue penetrating device100 stabilizes theinner needle122 as theinner needle122 is inserted through tissue of the patient. Since both theinner needle122 and theouter needle120, which is coaxially aligned with and positioned overinner needle122, are positioned adjacent the patient's tissue that is to be penetrated withinner needle122, theouter needle120 provides a relatively rigid sheath that reinforces theinner needle122 as the inner needle is penetrated through the patient's tissue. This configuration prevents or reduces buckling or bending of theinner needle122 as theinner needle122 is inserted through the patient's tissue. This configuration also allows the penetrating force of theinner needle122 to be concentrated at a distal tip of theinner needle122, thereby enabling theinner needle122 to easily puncture through tough scar tissue or other tissue, which may otherwise cause bending or buckling of theinner needle122.
• Although not shown inFIGS. 1 and 2, in some embodiments thefirst trigger mechanism106 and/orsecond trigger mechanism108 may be spring-loaded such that actuation of thefirst trigger mechanism106 and/orsecond trigger mechanism108 causes a spring to rapidly fire or deploy theouter needle120 and/orinner needle122 across the tissue of the patient (seeFIGS. 9A-E). Spring-loading thefirst trigger mechanism106 and/orsecond trigger mechanism108 may allow theinner needle122 and/orouter needle120 to easily penetrate relatively tough scar tissue or other tissue. Spring-loading of the trigger mechanisms, however, is typically not necessary and in fact may not be desired, since the support provided by theouter needle120 allows theinner needle122 to easily penetrate tough scar tissue and other tissue. In other embodiments, the first and/or second trigger mechanism may include a pneumatic mechanism that causes theinner needle122 and/orouter needle120 to be advanced via pressurized fluids.
• In some embodiments,inner needle122 may be an approximately a 21 Gauge (0.033 in) needle whileouter needle120 is a slightly larger needle, such as a 17.5 Gauge (0.054 in) needle and the like. The dimensions of the needles may be adjusted based on need, patient size, application or procedure, or otherwise as desired. In some embodiments, an outer diameter ofelongate shaft110 and/orouter sleeve130 is smaller than about 5 mm or 7.5 mm to allow theelongate shaft110 and/orouter sleeve130 to be inserted through a 5 mm or 7.5 mm trocar that is positioned through a relatively small incision in the patient's skin.
• In some embodiments, the distal end ofelongate shaft110 may include a joint member (see126 ofFIG. 3C and the like) that is couplable with a tissue anchoring or attachment device, such as those described in the '973 incorporated herein, that is positioned on or adjacent tissue to be penetrated withinner needle122. Thejoint member126 may allow theelongate shaft110 andbody102 to be aligned relative to the tissue anchoring device by some degree, such as up to about 10 and 30°. This allows the distal tip ofelongate shaft110 to be positioned adjacent the tissue to be penetrated withinner needle122 and for thetissue penetrating device100 to be offset so that theinner needle122 will penetrate the tissue at a desired angle and/or so that theouter needle120 will be positioned adjacent a desired insertion point of additional tissue after theouter needle120 is advanced fromelongate shaft110 and flexed or curved by radius R. Thejoint member126 allows theouter needle120 andinner needle120 to be steered posterior or anterior to the heart or so some feature of the heart. For example, the alignment of theelongate shaft110 relative to the tissue anchoring device and heart may be adjusted so that a tip of the outer needle120 (i.e., in a bent or straight configuration) and/or theinner needle122 may be positioned closer to a heart's apex, base, valve, septal or exterior wall, and the like as desired. This effectively allows the outer and/or inner needle's tip to be steered within or relative to a patient's heart or other tissue as needed or desired, which facilitates in precise placement and/or penetration of the needles relative to the tissue. Steering of theouter needle120 and/orinner needle122 may be further facilitated via the use of an imaging device (e.g., a thoracoscope, fluoroscope, and the like).
• In one embodiment, when thetissue penetrating device100 is used for treating congestive heart failure, thetissue penetrating device100 may be aligned so that the distal tip ofelongate shaft110 and/orouter needle120 is positioned toward an apex of the heart, toward a base of the heart, and/or toward any other desired feature of the heart. In some embodiments, the distal tip ofouter needle120 and/orinner needle122 may be radiopaque so that the distal tip is easily identifiable via an imaging device (e.g., a thoracoscope, fluoroscope, and the like). Further, thelocking mechanism132 ofouter sleeve130 may couple theelongate shaft110 with the tissue anchoring device and thejoint member126 may allow some degree of movement off-axis of theelongate shaft110 relative to the tissue anchoring device as further described in the '973 incorporated herein.
• In still other embodiments, the distal tip of theouter needle120 and/orinner needle122 may include a fluid pathway that allows a physician to monitor or measure pressure within the patient's body, such as within a chamber of the heart. Monitoring or measuring pressure may allow the location of the tip of the needle within the patient's body to be determined. In other embodiments, the distal tip of theneedle120 and/orinner needle122 may include a pressure transducer that allows a pressure within the patient to be measured or determined as either or both needles are inserted through tissue of the patient and/or within one or more chambers within the body. For ease in describing the embodiments herein, the needle's pressure sensing fluid pathway, pressure transducer, and the like, will be referred to hereinafter as a pressure sensing element.
• In one embodiment, when thetissue penetrating device100 is used for treating congestive heart failure, the pressure sensing element (e.g., fluid pathway and the like) may be used to determine when theinner needle122 and/orouter needle120 have penetrated through the external wall of the heart, when theinner needle122 and/orouter needle120 are positioned within a chamber of the heart, when theinner needle122 and/orouter needle120 are positioned adjacent a septal wall of the heart, and/or when theinner needle122 has penetrated through the septal wall and is positioned within the right ventricle of the heart. For example, the pressure sensing element may be used to measure or monitor left ventricle heart pressure, right ventricle heart pressure, and/or a damped pressure that corresponds to when the needle is imbedded within the wall of the heart (e.g., septum wall). The pressure sensing element may also be used to determine when theinner needle122 and/orouter needle120 are positioned adjacent scar tissue or contractile tissue of the heart to enable the physician to determine if theinner needle122 and/or outer needle are adjacent a desired insertion point. In a specific embodiment, theinner needle122 includes the pressure sensing element and the inner needle is used to sense pressure within the heart and/or elsewhere within the patient's body.
• Referring now toFIGS. 3A-6B, illustrated is an embodiment of operating atissue penetrating device100. Specifically,FIGS. 3A-3C illustrate thefirst trigger mechanism106 and thesecond trigger mechanism108 being positioned in a proximal position relative tobody102 such that theinner needle122 andouter needle120 are fully retracted and disposed within the lumen ofelongate shaft110. In some embodiments,locking mechanism132 may comprise threads that may be threaded with a corresponding aperture of a tissue anchoring device as described in the '973 application incorporated herein.FIG. 3B illustrates an enlarged perspective view ofbody102 and several components of thedevice100 and illustrates thatbody102 may include indicia that facilitates in informing a physician of the deployment of theouter needle120 and/orinner needle122.
• With theinner needle122 andouter needle120 fully retracted and disposed within the lumen ofelongate shaft110, the distal tip ofelongate shaft110 may be positioned adjacent the patient's tissue to be penetrated withinner needle122, and/or the distal tip ofelongate shaft110 may be coupled with a tissue anchoring device that is positioned adjacent the patient's tissue. After the distal tip ofelongate shaft110 is positioned adjacent the patient's tissue,second trigger mechanism108 may be slid distally alongbody102 to axially advanceinner needle122 from the lumen ofelongate shaft110 andouter needle120. Thesecond trigger mechanism108 may be slid distally alongbody102 by placing a finger (e.g., a forefinger) within thefirst trigger mechanism106 and by pressing on thesecond trigger mechanism108 with another finger (e.g., a thumb).FIGS. 4A-4C illustrate theinner needle122 extended fromelongate shaft110 after thesecond trigger mechanism108 is slid distally alongbody102. As shown inFIG. 4A,second trigger mechanism108 is positioned directly adjacent thefirst trigger mechanism106 aftersecond trigger mechanism108 is slid distally alongbody102.
• Advancing theinner needle122 fromelongate shaft110 as shown inFIG. 4C causes theinner needle122 to penetrate through tissue positioned adjacent the distal tip ofelongate shaft110. In this configuration,first trigger mechanism106 may be slid distally alongbody102 to cause theouter needle120 to slide within the lumen ofelongate shaft110 and advance distally fromelongate shaft110. Sliding thefirst trigger mechanism106 distally alongbody102 may be performed by placing a finger or fingers within finger guides104 and by pressing onfirst trigger mechanism106 with another finger.FIGS. 5A-5C illustrate theouter needle120 extending from the distal end ofelongate shaft110 after thefirst trigger mechanism106 is slid distally alongbody102.
• As shown, theinner needle122 may be retracted within anouter needle120 as thefirst trigger mechanism106 is slid distally alongbody102. Retraction of theinner needle122 may occur automatically as thefirst trigger mechanism106 is slid alongbody102. For example, theinner needle122 may remain in position as theouter needle120 is advanced until the distal tips of the inner needle and outer needle substantially align. Afterwards, advancement of theouter needle120 may cause theinner needle122 to also advance so that the distal tips of theinner needle122 andouter needle120 remain substantially aligned. In other embodiments, the retraction ofinner needle122 may be a manual process that is performed by a physician, such as by holding thesecond trigger mechanism108 in place asfirst trigger mechanism106 is slid distally alongbody102, or by slidingsecond trigger mechanism108 proximally alongbody102. As shown inFIG. 5B and as described herein,outer needle122 bends or curves away from an axis of the lumen ofelongate shaft110 as theouter needle120 is advanced distally away from the distal end ofelongate shaft110. The distal end ofouter needle120 may be advanced away from the distal end ofelongate shaft110 until the distal end of outer needle120 (and the distal end of inner needle122) is positioned adjacent tissue to be penetrated withinner needle122. As described herein, theouter needle120 is made of a flexible shape-memory material and has a preconfigured curved that may be configured or selected to fit or accommodate the heart geometry of a specific patient.
• After the distal end of theouter needle120, andinner needle122, is positioned adjacent tissue to be penetrated withinner needle122, thesecond trigger mechanism108 may be slid distally alongbody102 to extendinner needle122 beyond the distal end ofouter needle120 and thereby penetrate the patient's tissue.FIGS. 6A-6C illustrate thesecond trigger mechanism108 being slid distally alongbody102 to extendinner needle122 so as to penetrate tissue of the patient.FIG. 6A also illustrates atrack116 within which thefirst trigger mechanism106 and/orsecond trigger mechanism108 may slide.
• Referring now toFIGS. 7A-8I, a procedure for treating congestive heart failure using thetissue penetrating device100 is illustrated. Specifically,FIGS. 7A and 7B illustrate a series ofimplants10 implanted in a heart H so as to decrease a cross-section of a left ventricle LV. Eachimplant10 generally includes afirst anchor12, asecond anchor14, and atension member16 coupling the anchors together. Tension in thetension member16 is transferred from the anchors,12 and14, to the septum S and the external wall EW bordering the left ventricle LV so as to bring these structures into engagement, thereby effectively excluding a region of scar tissue ST from the left ventricle. In many embodiments described herein,implant10 will be deployed by penetrating the external wall EW and septum S via a pericardium P of the heart H, and also by accessing a right ventricle RV via a right atrium. Anchors deployed within a right ventricle and/or in engagement with the septum S may sometimes be referred to herein as septal anchors, while anchors deployed along the external wall EW of the left ventricle LV may be referred to as epicardial anchors.
• Referring now toFIGS. 7C and 7D an Mill image I taken along viewing plane VP schematically illustrates use of a thoracoscope orfluoroscope20 to provide a field of view encompassing a region of the pericardium of the heart, with the region including a target site for deployment of one or more epicardial anchors and/or septal anchors of the implant system.
• Referring now toFIG. 7E, joining of an access path through the right atrium to an access path through the pericardium and epicardium by snaring of a guidewire within the right ventricle under thoracoscopic/fluoroscopic guidance20 is schematically illustrated. The right atrial access path may extend into the arterial vasculature via the femoral artery FA and inferior vena cava IVC, via the jugular artery JA via the superior vena cava, or the like. As can be understood with reference toFIG. 8A, a selected location for perforation of the external wall EW can be identified using an image from thoracoscope/fluoroscope20, optionally in combination with an image from another imaging modality (such as a prior or contemporaneous image from an ultrasound imaging system, an MRI imaging system, an X-ray or fluoroscopic imaging system, a CT imaging system, and the like). In exemplary embodiments, ashaft430 of an access tool having a working lumen therethrough is advanced through the epicardium of the beating heart so that a distal end of theshaft430 is positioned adjacent the external wall EW of the heart.Shaft430 may comprise a trocar and may have a proximal hemostasis valve at its proximal end so as to inhibit bloodflow through the lumen and facilitate insertion and/or removal ofelongate shaft110 orouter sleeve130 oftissue penetrating device100.
• Acatheter404 is inserted into the arterial vasculature via the jugular artery JA and tricuspid valve; or in other embodiments, via the femoral artery FA and inferior vena cava IVC, via the via the superior vena cava, and the like. Asnare device402, such as a wire hoop or wire basket, is positioned against the septum S at or adjacent an insertion point forinner needle122.Snare device402 may be positioned against septum S by using an off-the-shelfsteerable catheter404. Thesnare device402 may provide a target forinner needle122.Snare device402 may be easily visible viafluoroscopy20 and provide a reference point for steering theinner needle122 and/orouter needle120. As described herein, the distal tip ofinner needle122 and/orouter needle120 may be radiopaque so that the distal tip of either or both needles is easily visible with afluoroscope20.
• Shaft430 may be positioned adjacent the external wall EW by inserting theshaft430 through an incision between ribs of the patient, such as between the fourth and fifth intercostal space. Although not shown in the figures, in some embodiments the tissue anchoring device may be inserted through a subxiphoid incision and positioned adjacent the external wall EW. The subxiphoid incision may be relatively small, such as a two or three finger incision. The tissue anchoring device may be coupled with the external wall EW and a distal end of theshaft430, or a distal end ofelongate shaft110, may be coupled with the tissue anchoring device to attach and/or stabilize theshaft430 and/orelongate shaft110 adjacent the external wall EW. The thoracoscope/fluoroscope20 may also be inserted through the subxiphoid incision.
• As shown inFIG. 8B, with theshaft430 positioned adjacent external wall EW, thesecond trigger mechanism108 may be actuated so as to advanceinner needle122 from the lumen ofelongate shaft110 and the lumen ofouter needle120 in order to penetrate the external wall EW. A pressure sensing element of inner needle122 (e.g., fluid pathway, pressure transducer, and the like) may be used to determine that theinner needle122 is positioned adjacent the external wall EW and/or inserted through the external wall EW and into the left ventricle LV. As shown inFIG. 8C, after theinner needle122 is inserted through the external wall EW, thefirst trigger mechanism106 may be actuated to extend theouter needle120 distally ofelongate shaft110 and through external wall EW. Theouter needle120, andinner needle122, may be advanced distally ofelongate shaft110 so that theouter needle120 curves or bends away from an axis of the lumen ofelongate shaft110 and toward septum S. Theinner needle122 may be retracted within anouter needle120 as theouter needle120 is advanced toward septum S so as to prevent theinner needle122 from penetrating other tissue of heart H. Theouter needle120 may be advanced until a distal end ofouter needle120 is positioned adjacent septum S. The pressure sensing element ofinner needle122 and/or ofouter needle120 may be used to determine that the distal tip ofouter needle120 is positioned adjacent septum S.
• Thesnare device402 and radiopaque distal tip ofouter needle120 and/orinner needle122 may also be imaged viafluoroscope20 to determine that the distal tip ofouter needle120 isnear snare device402. As described herein, as theouter needle120 curves or bends as it is being distally advanced, theinner needle122 is also forced to curve or bend along withouter needle120. As shown inFIG. 8D, when theouter needle120 andinner needle122 are positioned adjacent septum S, thesecond trigger mechanism108 may be actuated so as to advanceinner needle122 distally ofouter needle120 and penetrate the septal wall S. Theinner needle122 is inserted through septum S and into right ventricle RV so that the distal end ofinner needle122 is disposed withinsnare402. As shown inFIG. 8D, the guidewire GW is then inserted through a lumen ofinner needle122 and into right ventricle RV. Thesnare device402 may then be retracted withincatheter404 so that thesnare device402 snares the distal tip ofinner needle122 and/or guidewire GW. With the distal tip ofinner needle122 snared bysnare device402, theinner needle122 andouter needle120 may be retracted withinelongate shaft110 so that the guidewire GW remains snared withinsnare device402.
• Theinner needle122,outer needle120, andelongate shaft110 may then be removed from the patient's body and the guidewire GW may be pulled throughcatheter404 or retracted through septum S and external wall EW to a position outside the patient's body. As shown inFIG. 8F, in this manner, an insertion path of the guidewire GW and an insertion path of thecatheter404/snare device402 may be joined so that the guidewire GW, or another wire, extends from a first point outside the patient's body, through the external wall EW, through the septum S, through the jugular artery JA or femoral artery FA, and outside the patient's body at a second and different point. With guidewire GW extending through heart H and outside the patient's body as described above, a tension member ortether412 may be coupled with the guidewire GW and inserted through the jugular artery JA, into the right ventricle RV, through septum S and external wall EW, and out of the patient's body.FIG. 8F illustrates that the component inserted through heart H may represent the guidewire GW, thetension member412, or both.
• A septal anchor (i.e.,410 ofFIGS. 8G-8I) is coupled with a distal end oftension member412 so that as thetension member412 is inserted through the jugular artery JA and through heart H, theseptal anchor410 is brought into position adjacent septum S. Exemplary embodiments ofseptal anchors410 andtension members412 are described in U.S. patent application Ser. No. 13/632,104, filed Sep. 30, 2012 and entitled “Trans-Catheter Ventricular Reconstruction Structures, Methods, and Systems for Treatment of Congestive Heart Failure and Other Conditions”, the entire disclosure of which is incorporated herein by reference.
• FIG. 8G illustrates theseptal anchor410 positioned adjacent septum S within right ventricle RV.Tension member412 extends fromseptal anchor410 through septum S into left ventricle LV and through external wall EW.FIG. 8H illustrates that anepicardial anchor414 is coupled withtension member412 and slid distally alongtension member412 until theepicardial anchor414 is positioned adjacent external wall EW. An epicardialanchor application device422 may be used to slideepicardial anchor414 proximally and/or distally alongtension member412 to external wall EW. The epicardialanchor application device422 may also be used to apply tension betweenseptal anchor410 andepicardial anchor414 to urge or bring the septum S and external wall EW together. The epicardialanchor application device422 may provide an indication of the force applied by thedevice422 to theepicardial anchor414. This may allow a user to determine when an appropriate force has been applied to theanchor414 to bring the septum S and external wall EW into engagement without risking unnecessary damage to the heart and/or anchors—e.g., the anchors pulling or tearing through the heart tissue.
• The epicardialanchor application device422 may further be used to lock or secure theepicardial anchor414 in place abouttension member412 to prevent theepicardial anchor414 from moving proximally alongtension member412 and to keep the septum S and external wall EW in position relative to one another. The epicardialanchor application device422 may then be uncoupled from theepicardial anchor414 and removed from the patient's body. An exemplary embodiment of anepicardial anchor414 is illustrated inFIGS. 11A-D and described in the '104 application incorporated herein. An exemplary embodiment of an epicardialanchor application device422 is illustrated inFIGS. 10A-E and described in greater detail herein below.
• As shown inFIG. 8I, after theseptal anchor410 andepicardial anchor414 are tensioned so that the septum S and external wall EW are brought together, thetension member412 proximal toepicardial anchor414 may be cut and discarded. Theseptal anchor410 andepicardial anchor414 may be left in position relative to septum S and external wall EW with the heart H reconfigured to reduce a volume of left ventricle LV and exclude scar tissue from the left ventricle LV. The above process may be repeated a plurality of times to position additionalseptal anchors410 and/or epicardial anchors414 about the septum S and external wall EW. The anchors may be aligned about a desired contour of the heart, such as a contour defined by scar tissue and the like. In some embodiments, the contour for placement of multiple anchors may be determined via an image of the heart and insertion points for the anchors may be calculated or measured from the image. The insertion points may then be mapped or marked on the heart, such as by using a template or pattern. In this manner, the shape of heart H and the volume of left ventricle LV may be reconfigured as desired.
• In some embodiments, deployment of multiple anchors about the septum S and/or external wall EW may be accomplished using multiple access ports and trocars or cannulas, or multiple anchors may be deployed via the same access port. For example, in some embodiments the tissue penetrating device may be used to penetrate the external wall EW and/or septum S in multiple locations via the same access port. The tissue penetrating device is capable of delivering multiple penetrations via a single access port due, in part, to the bending or curving of the outer and inner needle. Further, in some embodiments the tissue penetrating device may be inserted through various incisions to penetrate the heart's tissue and deliver heart anchors, such as through incisions between ribs, subxiphoid incisions, and the like.
• In another embodiment, the process illustrated inFIGS. 8A-I may essentially occur in reverse. For example, the tissue penetrating device may be inserted into the arterial vasculature via the femoral artery FA and inferior vena cava IVC, via the jugular artery JA via the superior vena cava, or the like. In such embodiments, theelongate shaft110 may be a catheter that is easily insertable and/or steerable through the patient's arteries and into the arterial vasculature. The catheter (i.e., elongate shaft110) may then be inserted into the right ventricle RV via the tricuspid valve and the distal tip of the catheter may be positioned adjacent the septum S. Theinner needle122 may then be advanced distally of the catheter to penetrate through the septum S. Theouter needle120 may then be advanced through the septum S and advanced toward the external wall EW. Theouter needle120 may bend, flex, or curve as it is being advanced toward the external wall EW as described herein.
• Asnare device402 may be positioned adjacent the external wall EW and may provide a target for placement of the distal tip of theouter needle120 relative to the external wall EW of the left ventricle LV. The distal tip of theouter needle120 may be positioned adjacent the external wall EW at or near the target position defined by thesnare device402 and theinner needle122 may be advanced distally of theouter needle120's distal end to penetrate through the external wall EW. Theinner needle122, and/or a guidewire GW inserted through theinner needle122's lumen, may then be snared viasnare device402 so as to join a pathway of the guidewire GW andsnare device402 as described herein. Placement of the septal anchors and/or epicardial anchors may then be performed as described above.
• In some embodiments, thesnare device402 may be inserted through the external wall EW and into the left ventricle LV and theouter needle120 may be advanced within the left ventricle LV toward thesnare device402. Theouter needle122 may be advanced within the left ventricle LV until it is able to be snared bysnare device402, afterwhich theouter needle120,inner needle122, and/or guidewire GW may be snare to join access paths and deploy septal and/or epicardial anchors as described herein.
• Referring now toFIGS. 9A-9E, illustrated is an embodiment of atissue penetrating device900 having a spring actuated triggering mechanism.FIGS. 9B-9E illustrate enlarged cross section views of thedevice900 showing the various components in greater detail.Tissue penetrating device900 may be actuated to rapidly fire or deploy an outer needle and/or inner needle across the tissue of the patient, such as across an external wall EW or septalwall S. Device900 includes a straightneedle trigger rod901 that may be actuated by a physician to rapidly deploy an inner and/or outer needle, and more commonly only an inner needle.
• Device900 includes anouter housing902.Device900 further includes atrigger release sleeve903 that may be rotated to releasetrigger release tabs906 via a window913 (FIG. 9C) and thereby actuatetrigger rod901. In one embodiment,device900 may include 3trigger release tabs906 and 3windows913.Device900 additionally includes atrigger spring904 that, upon actuation, causes triggerrod901 to rapidly move distally relative to the other components ofdevice900.Device900 also includes aspring905 fortrigger release sleeve903.Device900 additionally includes a straight orinner needle907 that is rapidly fired or deployed upon actuation oftrigger spring904 andtrigger rod901.Device900 also includes a curved orouter needle909 and two needle inserts908 and910. An elongated shaft orsheath911 is coupled with a distal end ofinsert910 and includes a lumen within whichouter needle909 andinner needle907 are coaxially aligned and slidably disposed. As shown inFIG. 9C, thetrigger release tabs906 may be pivotally coupled tohousing902 via apivot pin912 and may prevent distal movement oftrigger rod901 until released by rotatingtrigger release sleeve903 and aligningtrigger release tabs906 withcorresponding windows913.
• Rotatingtrigger release sleeve903 so as to aligntrigger release tabs906 with the correspondingwindows913 actuates triggerrod901 and causes thetrigger rod901 to spring forward viatrigger spring904 until a distal end oftrigger rod901 contacts insert908. The forward springing movement oftrigger rod901 causesinner needle907 to rapidly deploy relative toouter needle909 andelongate shaft911 and thereby penetrate tissue adjacent a distal end of theelongate shaft911 and/orouter needle909. Thetrigger rod901,trigger spring904, and triggerrelease sleeve903 may be reset for subsequent firing.
• FIGS. 10A-E illustrate an embodiment of an exemplary epicardialanchor application device1000.FIG. 10A illustrates a perspective view of the epicardialanchor application device1000. The epicardialanchor application device1000 includes amain body1002 and asecondary body1010 that is disposed withinmain body1002 and axially moveable relative thereto. A spring component (1030 ofFIGS. 10D & 10E) is disposed within themain body1002 and engages a distal end of thesecondary body1010 to allow thesecondary body1010 to move axially within themain body1002. The epicardialanchor application device1000 includes a switch, mode button, orlocking mechanism1050 that is actuatable by a user to lock and unlock thesecondary body1010 relative to themain body1002 as described herein.
• The epicardialanchor application device1000 further includes anelongate shaft1020 that is coupled with and extends distally from thesecondary body1010. Theshaft1020 is configured for insertion through a trocar or cannula positioned in an incision between ribs or elsewhere of a patient to allow a pair of hooks,1022 and1024, at the distal end of theelongate shaft1020 to engage with an epicardial anchor (i.e.,1155 ofFIGS. 11A-D). Anengagement pin1025 is positioned between the pair of hooks,1022 and1024, and is configured to engage a cam spring mechanism of the epicardial anchor to lock and unlock the epicardial anchor about a tether or tension member as described hereinbelow.
• In operation, the epicardialanchor application device1000 is used to move the epicardial anchor proximally and distally along the tether or tension member and into engagement with an external wall EW of the heart. The epicardialanchor application device1000 may then be used to apply a force to the epicardial anchor to urge the external wall EW toward and into engagement with the septum S. The pair of hooks,1022 and1024, andengagement pin1025 may then be used to lock the epicardial anchor about the tether or tension member with the external wall EW and septum S in contact. The epicardialanchor application device1000 is also configured to provide an indication of the force applied to the epicardial anchor as the external wall EW and septum S are brought into engagement.
• In some embodiments, the epicardialanchor application device1000 may be operated in a first mode and a second mode. In the first mode, thesecondary body1010 may be locked relative to themain body1002 to allow the epicardialanchor application device1000 to move the epicardial anchor proximally and distally along the tether without providing an indication of the force applied to the epicardial anchor. This may allow the external wall EW and septum S to be easily brought into contact since essentially the entire force applied by the epicardialanchor application device1000 is transferred to the epicardial anchor. Stated differently, engaging the external wall EW and septum S with the epicardialanchor application device1000 positioned in the first or locked mode may be relatively easy since the force applied to the epicardialanchor application device1000 and/or the beating of the heart is not causing thesecondary body1010 to move axially within themain body1002. When the external wall EW and septum S are brought into contact, the epicardialanchor application device1000 may be switched to the second mode that allows thesecondary body1010 to move axially within themain body1002 to provide an indication of the force being applied to the epicardial anchor by the epicardialanchor application device1000. In this manner a user may apply an appropriate amount of tension between the epicardial anchor and a septal anchor since the applied force is displayed, indicated, provided, or otherwise made available to a user.
• The applied force may be sufficient to keep the external wall EW and septum S in engagement with one another while minimizing or eliminating unnecessary damage to the heart tissue. In some embodiments, the applied force may include a Ventricular Contractile Force (VCF), or a force necessary to overcome a beating of the heart, and an additional force of between about 2N and about 6N. In another embodiment, the applied force may include a Ventricular Contractile Force (VCF) and an additional force of between about 3N and about 4N. These forces are sufficient to ensure that the external wall EW and septum S remain engaged or in contact without damaging the tissue of the heart.
• FIG. 10B illustrates a side profile view of the epicardialanchor application device1000.FIG. 10B shows thesecondary body1010 positioned withinmain body1002 and shows theelongate shaft1020 extending distally from adistal end1014 of thesecondary body1010. Thelever mechanism1012 is shown in a locked or engaged position in which the pair ofhooks1022 and1024 would engage with an epicardial anchor and allow the anchor to move proximally and distally along a tether as described below. To unlock or disengage the epicardial anchor, thelever mechanism1012 may be rotated clockwise relative to thesecondary body1010, which would result in the pair ofhooks1022 and1024 disengaging from the epicardial anchor, thereby locking the anchor about the tether to restrict proximal movement of the anchor about the tether.FIG. 10B also shows thesecondary body1010 includingindicia1018 that provides an indication of the anchor force applied to the epicardial anchor as thesecondary body1010 moves axially within themain body1002. Theindicia1018 may include a plurality of concentric rings or markings positioned axially along thesecondary body1010 that each indicate or display a number corresponding to an applied force (e.g., 1N, 2N, 3N, and the like).
• FIG. 10C illustrates another side profile view of the epicardialanchor application device1000 with the device rotated approximately 90 degrees about a central axis.FIG. 10C illustrates many of the components of epicardialanchor application device1000 previously described and further illustrates the locking mechanism ormode button1050 in greater detail. Specifically,locking mechanism1050 includes a proximal end having a boss orshaft1054 that extends into an aperture (not shown) of themain body1002 to lock thesecondary body1010 in position relative to themain body1002. Thelocking mechanism1050 also includes a distal end that may be pressed by a user to cause the proximal end to pivot so that theboss1054 pivots out of the aperture ofmain body1002. Pivoting theboss1054 out of the aperture of themain body1002 unlocks thesecondary body1010 relative to themain body1002 and allows thesecondary body1010 to slide or move axially within themain body1002 so as to provide an indication of an applied anchor force.
• FIG. 10D illustrates a cross section view of the epicardialanchor application device1000 taken along line A-A ofFIG. 10C. The cross sectional view illustrates various internal components of the epicardialanchor application device1000. Specifically,FIG. 10D illustrates thespring component1030 positioned withinmain body1002. Thespring component1030 is configured to engage the proximal end of thesecondary body1010 and apply a spring force thereto. Specifically, thespring component1030 includes adistal plug1032 that engages thesecondary body1010 to transfer or provide the spring force to thesecondary body1010. The spring force is used in determining the force applied to the anchors by the epicardialanchor application device1000. The cross sectional view also illustrates an inner shaft1042 (FIG. 10E) positioned within theelongate shaft1020. Theinner shaft1042 is movable or slidable within theelongate shaft1020 to allow the pair ofhooks1022 and1024 to move axially outward and inward relative to theelongate shaft1020 andengagement pin1025 and thereby lock and unlock the epicardial anchor as described below.
• FIG. 10E illustrates an exploded perspective view of the components of epicardialanchor application device1000. As shown inFIG. 10E,main body1002 may be coupled withlocking mechanism1050 via apin1052 that allows thelocking mechanism1050 to pivot such thatboss1054 is able to pivot into and out of theaperture1053 ofmain body1002 as a user presses and releases a distal portion of thelocking mechanism1050. Aspring1008 may be positioned under the distal portion of thelocking mechanism1050 to bias thelocking mechanism1050 toward a locked position in which theboss1054 is positioned within theaperture1053 ofmain body1002. Themain body1002 may also include abottom plug1004 that may be coupled with themain body1002 via apin1006. Thebottom plug1004 provides a surface against which thespring component1030 presses as thesecondary body1010 moves axially within themain body1002.
• To lock thesecondary body1010 relative to themain body1002, theboss1054 oflocking component1050 may engage with a groove orchannel1016 ofsecondary body1010 when theboss1054 is positioned within the aperture ofmain body1002. Frictional contact between theboss1054 andchannel1016 may preventsecondary body1010 from moving axially within themain body1002. In some embodiments, thesecondary body1010 may be locked relative to themain body1002 in any axial position withinmain body1002. In other embodiments, thesecondary body1010 may be locked relative tomain body1002 only in a fully extended position, such as by insertion ofboss1054 within anaperture1017 positioned at a distal end of groove orchannel1016. In such embodiments,boss1054 may slide along groove orchannel1016 to allow thesecondary body1010 to slide relative tomain body1002 untilboss1054 engages withaperture1017. This embodiment may allowlocking mechanism1050 to be pressed only a single time to retractboss1054 fromaperture1017 andposition boss1054 within groove orchannel1016 and thereby enable sliding ofsecondary body1010 withinmain body1002 untilaperture1017 is reengaged byboss1054.
• FIG. 10E further illustrates thelever mechanism1012 that may be operated to lock and unlock an epicardial anchor. Thelever mechanism1012 may include a cap that softens a force or pressure exerted on the user's finger as the user operateslever mechanism1012. Theelongate shaft1020 may be coupled with adistal end1014 ofsecondary body1010 using a set screw or any other known coupling mechanism in the art (e.g., adhesive bonding, welding, mechanically fastening, and the like). As described herein, a pair of hooks or arms,1022 and1024, are positioned at the distal end of theelongate shaft1020. Theelongate shaft1020 includes a lumen within which aninner shaft1042 is slidably disposed. Theinner shaft1042 includes apin1044 that couples with thelever mechanism1012 to allow theinner shaft1042 to slide proximately and distally withinelongate shaft1020 as thelever mechanism1012 is operated by a user. A distal end of theinner shaft1042 engages with the pair of hooks or arms,1022 and1024, to allow the hooks or arms to engage with an epicardial anchor and thereby lock and unlock the epicardial anchor about a tether as thelever mechanism1012 is operated by a user.
• Theinner shaft1042 also includes a pair ofwashers1040 and1048 that are used to align the components within the assembly. Theinner shaft1042 further includes aspring component1046 that biases theinner shaft1042 distally relative to theelongate shaft1020 to ensure that the pair of hooks,1022 and1024, remain unlocked or disengaged from the epicardial anchor when thelever mechanism1012 is in an unlocked or disengaged configuration. Stated differently, thespring component1046 ensures that the pair ofhooks1022 and1024 do not remain locked or engaged with the epicardial anchor when the lever mechanism is operated by a user to release the epicardial anchor.
• FIGS. 11A-D illustrate an embodiment of an exemplaryepicardial anchor1155. As described herein,epicardial anchor1155 may be coupled with a tension member or tether and advanced toward an external wall EW of the heart via an epicardial anchor application device or tensioning device, such as those illustrated inFIGS. 10A-E.Epicardial anchor1155 includes alumen1153, through which a tether is inserted.Epicardial anchor1155 has aspring cam structure1163, which is more fully described in U.S. Patent Publication No. US2010/0016655, entitled “Cardiac Anchor Structures, Methods, and Systems for treatment of Congestive Heart Failure and Other Conditions;” the full disclosures of which are incorporated herein by reference. Thespring cam1163 allows theepicardial anchor1155 to slide along a tether toward a septal anchor that is positioned adjacent the septum, but inhibits sliding of theepicardial anchor1155 away from the septal anchor. As such, thespring cam1163 effectively maintains a tissue engagement force between theepicardial anchor1155 and a septal anchor.
• To engage thecam spring mechanism1163 ofepicardial anchor1155, the epicardialanchor application device1000 includes a pair of hooks,1022 and1024, that are positionable around a pair ofarms1164 ofepicardial anchor1155. The pair ofarms1164 are in turn connected to, or otherwise operationally coupled with,cam spring mechanism1163. A rod (i.e., engagement rod1025) may be positioned between the pair of hooks,1022 and1024, and may engage thecam spring mechanism1163 to pivot the cam mechanism between a locked or engaged state and an unlocked or unengaged state. In operation, the pair of hooks,1022 and1024, may be clamped aroundarms1164 so thathousing1165 is positioned betweenhooks1022 and1024. Thelever mechanism1012 may then be operated to retract theinner shaft1042 and hooks,1022 and1024, at least partially withinelongate shaft1020 which causes therod1025 to contact and press againsthousing surface1166. Operation of thelever mechanism1012 forces therod1025 to push onhousing surface1166, which causeshooks1022 and1024 to pull onarms1164, which in turn causescam spring mechanism1163 to rotate away from and/or out of contact with the tether of tension member (i.e.,412 ofFIGS. 8F-H), thereby permittingepicardial anchor1155 to slide both distally and proximally alongtether412 toward and away from the septal anchor (i.e.,410 ofFIGS. 8G-I).
• Similarly, thelever mechanism1012 may be operated in a reverse manner to cause theinner shaft1042 and hooks,1022 and1024, to extend fromshaft1020, which allows thearms1164 to resiliently return to a position in which the cam rotates into contact with thetether412, thereby inhibiting theepicardial anchor1155 from sliding proximally along the tether and away from theseptal anchor410.Arms1164 may function as a spring to bias thecam1163 toward thetether412 and lockepicardial anchor1155 about thetether412. Thelever mechanism1012 may be operated from outside the patient's body to lock theepicardial anchor1155 relative to thetether412 or unlock theepicardial anchor1155 relative to thetether412. In this manner, the epicardialanchor application device1000 may be used to reconfigure theepicardial anchor1155 between a variable force mode that allows theepicardial anchor1155 to slide proximally and distally along the tether or tension member and a set force mode that restricts proximal movement of theepicardial anchor1155 along the tether or tension member.
• To more accurately apply septal/external wall engagement forces within a desired range, epicardialanchor application device1000 can engage thecam spring mechanism1163 ofepicardial anchor1155 to reconfigure theepicardial anchor1155 into a variable force mode in which the anchor is free to slide in both axial directions along thetether412. This allows a controlled force to be applied between thetether412 andepicardial anchor1155 despite a beating of the heart.
• The applied anchor force may be an appropriate amount of force to bring external wall EW and septum S into engagement while preventing migration of theepicardial anchor1155 and a septal anchor relative to external wall EW and septum S. For example, the force may be sufficient so that an inner surface of external wall EW and septum SE directly contact each other and so thatepicardial anchor1155 and a septal anchor are secured tightly about external wall EW and septum S, but not too strong to causeepicardial anchor1155 and/or septal anchor to be pulled through and/or into external wall EW and/or septum S.
• Referring now toFIG. 12, illustrated is a method for securing heart anchors of a heart implant device. Atblock1210, a first anchor is positioned in engagement with a first wall of the heart. The first anchor is coupled with a tension member or tether as described herein. Atblock1220, a second anchor is positioned in engagement with a second wall of the heart. The second anchor is slidably coupled with the tension member or tether such that the second anchor may slide proximally and distally along a length of the tension member. Atblock1230, a tensioning device is advanced over the tension member so that a distal end of the tensioning device engages the second anchor while a main body of the tensioning device is positioned outside of the body. The tensioning device may be similar to any of the embodiments described herein, such as the epicardialanchor application device1000 illustrated inFIGS. 10A-E. Atblock1240, a desired anchor force is applied between the tension member and the second anchor via the tensioning device so that the first anchor provides a force urging the first wall toward the second wall and the second anchor provides a force urging the second wall toward the first wall. As described herein, the tensioning device provides an indication of the anchor force applied to the second anchor by the tensioning device. Atblock1250, a locking mechanism of the tensioning device is actuated to secure the second anchor to the tension member to restrict proximal movement of the second anchor along the tension member.
• In some embodiments, the locking mechanism of the tensioning device reconfigures the second anchor from a variable force mode that allows the second anchor to slide proximally and distally along the tension member to a set force mode that restricts proximal movement of the second anchor along the tension member, and vice versa. In some embodiments, actuating the locking mechanism of the tensioning device causes a pair of hooks to move axially relative to a pin positioned at a distal end of an elongate shaft of the tensioning device. Movement of the pair of hooks relative to the pin forces the pin into engagement with a cam component of the second anchor to lock and unlock the second anchor.
• In some embodiments, the method also includes advancing the second anchor distally along the tension member with the tensioning device in a first mode of operation, the first mode of operation allowing the tensioning device to engage the second anchor to urge the second wall toward the first wall without indicating the anchor force being applied by the tensioning device, and applying the desired anchor force to the second anchor with the tensioning device in a second mode of operation, the second mode of operation allowing the tensioning device to provide the indication of the anchor force applied to the second anchor by the tensioning device. In some embodiments, the method may further include actuating a mode button of a main body of the tensioning device to switch the tensioning device from the first mode of operation to the second mode of operation. In some embodiments, the applied anchor force may include a Ventricular Contractile Force (VCF) and an additional force of between about 2N and about 6N. In other embodiments, the applied anchor force may include a Ventricular Contractile Force (VCF) and an additional force of between about 3N and about 4N.
• Having described several embodiments, it will be recognized by those of skill in the art that various modifications, alternative constructions, and equivalents may be used without departing from the spirit of the invention. Additionally, a number of well-known processes and elements have not been described in order to avoid unnecessarily obscuring the present invention. Accordingly, the above description should not be taken as limiting the scope of the invention.
• Where a range of values is provided, it is understood that each intervening value, to the tenth of the unit of the lower limit unless the context clearly dictates otherwise, between the upper and lower limits of that range is also specifically disclosed. Each smaller range between any stated value or intervening value in a stated range and any other stated or intervening value in that stated range is encompassed. The upper and lower limits of these smaller ranges may independently be included or excluded in the range, and each range where either, neither or both limits are included in the smaller ranges is also encompassed within the invention, subject to any specifically excluded limit in the stated range. Where the stated range includes one or both of the limits, ranges excluding either or both of those included limits are also included.
• As used herein and in the appended claims, the singular forms “a”, “an”, and “the” include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to “a process” includes a plurality of such processes and reference to “the device” includes reference to one or more devices and equivalents thereof known to those skilled in the art, and so forth.
• Also, the words “comprise,” “comprising,” “include,” “including,” and “includes” when used in this specification and in the following claims are intended to specify the presence of stated features, integers, components, or steps, but they do not preclude the presence or addition of one or more other features, integers, components, steps, acts, or groups.

Claims (20)

1. (canceled)

2. A heart anchor positioning device comprising:

a device body;

an elongate shaft that is slidingly positioned within the device body, the elongate shaft having a proximal end, a distal end, and a lumen that extends between the proximal end and the distal end so that the heart anchor positioning device is advancable over a tension member, the distal end of the elongate shaft being configured to engage a heart anchor to apply an anchor force to the heart anchor;

wherein the heart anchor positioning device is configured to:

provide a visual indication of the anchor force applied to the heart anchor; and

switch the heart anchor between a variable force mode that allows the heart anchor to slide axially along the tension member and a set force mode that inhibits axial movement of the heart anchor along the tension member.

3. The heart anchor positioning device ofclaim 2, wherein the elongate shaft includes an anchor coupling mechanism that engages the heart anchor and that is configured to push the heart anchor distally along the tension member and to pull the heart anchor proximally along the tension member.

4. The heart anchor positioning device ofclaim 3, wherein the anchor coupling mechanism includes a hook member that engages with a heart anchor and a pin that is moveable axially relative to the hook member to engage a cam component of the heart anchor and thereby switch the heart anchor between the variable force mode and the set force mode.

5. The heart anchor positioning device ofclaim 4, wherein the device body includes a locking component that is actuatable by a user to move the pin axially relative to the hook member and thereby switch the heart anchor between the variable force mode and the set force mode.

6. The heart anchor positioning device ofclaim 5, wherein the elongate shaft includes an inner shaft and an outer shaft, and wherein the inner shaft is axially moveable relative to the outer shaft in response to actuation of the locking component, wherein axial movement of the inner shaft relative to the outer shaft moves the pin axially relative to the hook member.

7. The heart anchor positioning device ofclaim 6, wherein the inner shaft and the outer shaft are coupled to a secondary body that is slidably positioned within the device body, and wherein the inner shaft and the outer shaft slide together with the secondary body within the device body.

8. The heart anchor positioning device ofclaim 2, wherein the visual indication of the anchor force applied to the heart anchor is provided based on axial sliding of the elongate shaft within the device body.

9. The heart anchor positioning device ofclaim 8, wherein the device body includes a button component that is acutatable to prevent axial sliding of the elongate shaft within the device body so that the visual indication of the anchor force is not provided and that is further actuatable to enable axial sliding of the elongate shaft within the device body so that the visual indication of the anchor force is provided.

10. The heart anchor positioning device ofclaim 8, wherein the elongate shaft is operably coupled with a spring component positioned within the device body, wherein the spring component enables the elongate shaft to move axially within the device body and biases the elongate shaft toward a fully deployed position relative to the device body.

11. The heart anchor positioning device ofclaim 8, further comprising indicia that visually indicates the anchor force applied to the heart anchor as the elongate shaft is moved axially within the device body.

12. A method of tensioning a heart anchor with a heart anchor positioning device, the method comprising:

providing the heart anchor positioning device, the heart anchor positioning device including:

a device body; and

an elongate shaft that is slidingly positioned within the device body, the elongate shaft having a proximal end, a distal end, and a lumen that extends between the proximal end and the distal end;

coupling the distal end of the elongate shaft with the heart anchor;

positioning a tension member within the lumen of the elongate shaft so that the elongate shaft is advanceable over the tension member;

advancing the heart anchor along the tension member so that the heart anchor is positioned adjacent a wall of a heart;

applying an anchor force to the heart anchor to urge the wall toward an opposite wall of the heart; and

switching the heart anchor from a variable force mode in which the heart anchor is slidable along the tension member to a set force mode in which the heart anchor is inhibited from sliding along the tension member;

wherein the heart anchor positioning device is configured provide a visual indication of the anchor force applied to the heart anchor.

13. The method ofclaim 12, further comprising actuating a locking mechanism to switch the heart anchor from the variable force mode to the set force mode.

14. The method ofclaim 13, wherein actuating the locking mechanism moves a hook member axially relative to a pin positioned on a distal end of an elongate shaft, and wherein movement of the hook member relative to the pin causes a cam component of the heart anchor to engage the tension member.

15. The method ofclaim 12, further comprising:

advancing the heart anchor along the tension member while the elongate shaft is locked relative to the device body; and

applying the anchor force to the heart anchor while the elongate shaft is unlocked relative to device body so that the elongate shaft is axially moveable within the device body.

16. The method ofclaim 15, further comprising actuating a button component of the device body to switch the elongate shaft from being locked to unlocked relative to the device body.

17. The method ofclaim 12, wherein the anchor force comprises a Ventricular Contractile Force (VCF) and an additional force of between about 2N and about 6N.

18. The method ofclaim 17, wherein the anchor force comprises a Ventricular Contractile Force (VCF) and an additional force of between about 3N and about 4N.

19. The method ofclaim 12, further comprising disengaging the distal end of the elongate shaft from the heart anchor and withdrawing the elongate shaft over the tension member.

20. The method ofclaim 12, wherein the elongate shaft is operably coupled with a spring component positioned within the device body, wherein the spring component enables the elongate shaft to move axially within the device body and biases the elongate shaft toward a fully deployed position relative to the device body.

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